The Scripture Is False And The Biblical God Is Dead.

[The Grand Nudger]

Chalmers proposed it because chalmers is a dualist who believes that consciousness does not logically follow from any physical fact. Diving deeper I think chalmers proposed it because it's what dennet would call an intuition pump. To describe important things, so long as we don't get boggged down in the mess of possibly incorrect or inconceivable postulates that exploration might depend on. The trouble with intuition pumps only shows up when those details we don't want to get bogged down in are germane to the conclusions being advanced. An impossible dillemma in the confluence between pz and ep - as they're directly and fundamentally contradictory positions within dualism. EP denies the details of the pz, and the pz denies the details of ep. So, the devil really is there, if it's anywhere - which is what the dispute over conceivability is about in a nutshell. We can lazily and irrationally imagine any old thing, but this is not the bar for logical conceivability, and even that form of conceivability that the proposition goes for (if it's advanced as a refutation of physicalism) relies on a modal hook which is, itself, contested. Because it is necessarily true that physicalism is false in the zombie world, and if the zombie world is a possible world, then it's necessarily true that physicalism is false in all worlds.

I can't personally think of any argument or conclusion that needs the pzombie to proceed. Questions about the justification for the zombies reports of phenomenal content and what that says about ours, for example? That's the paradox of phenomenal judgement I'd yammered about earlier. It's fully contained within ep all by it's lonesome - so, whatever baggage the zombie brings to this question doesn't come with any additional logical utility. Ultimately, "forget the zombie" is the final step in every zombie argument, anyway, as none of them are about zombies or zombie worlds. They're about us, this world.